sedimentary
Hag Stone
Perforated Sedimentary Rock
AI-generated identification · may be incorrectHardness varies from 3 to 7 depending on mineral content; color is typically grey, brown, or tan; dull luster with a natural hole bored through the center.
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Physical properties
Hardness varies from 3 to 7 depending on mineral content; color is typically grey, brown, or tan; dull luster with a natural hole bored through the center.
Formation & geological history
Formed by natural water erosion, where acidic water or abrasive sand swirls persistently against a softer mineral vein in a rock over thousands of years.
Uses & applications
Used traditionally in folklore as protective talismans, and collected as natural curiosities by enthusiasts.
Geological facts
Also known as adder stones or witch stones, historical folklore attributes protective and magical sight-granting properties to them.
Field identification & locations
Identified by a distinct, naturally occurring hole passing completely through the rock. Commonly found on riverbanks, lake shores, and beaches.
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